Q:Where is the Play Store app?A: Unfortunately, for some tablets, Google and/or the country that produced the tablet was manufactured in does not support official Google apps and you will not have access to the Play Store.

Q:How can I improve the battery life of my W17PRO? A: Tablets operate on a sort of spectrum. On one end you could put battery life, on the other end all those options like wifi/bluetooth/sync (amongst other things). If you want great battery life you can't have those on all the time. If you want those on all the time, you won't get great battery life. It is best to find the compromise that works best for you and what you want most out of your tablet.
Here are a couple of things that you could consider - adjust the screen brightness, do not use live wallpapers, switch off networks when not in use (WIFI, Bluetooth, GPS), adjust update intervals for widgets (do you really need twitter/facebook notifications every half hour?). You could also consider downloading a battery monitoring app such as JuiceDefender.